EP1506834B1 - Method of welding a seam between two workpieces of a level measuring device - Google Patents

Method of welding a seam between two workpieces of a level measuring device Download PDF

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Publication number
EP1506834B1
EP1506834B1 EP04010150A EP04010150A EP1506834B1 EP 1506834 B1 EP1506834 B1 EP 1506834B1 EP 04010150 A EP04010150 A EP 04010150A EP 04010150 A EP04010150 A EP 04010150A EP 1506834 B1 EP1506834 B1 EP 1506834B1
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EP
European Patent Office
Prior art keywords
welding
component
components
welded
filler material
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Expired - Fee Related
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EP04010150A
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German (de)
French (fr)
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EP1506834A1 (en
Inventor
Frank Becherer
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Vega Grieshaber KG
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Vega Grieshaber KG
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Publication of EP1506834A1 publication Critical patent/EP1506834A1/en
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/28—Seam welding of curved planar seams
    • B23K26/282—Seam welding of curved planar seams of tube sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B23K35/0261—Rods, electrodes, wires
    • B23K35/0277—Rods, electrodes, wires of non-circular cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
    • B23K37/0533—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor external pipe alignment clamps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/02—Welded joints
    • F16L13/0218—Welded joints having an inner or outer ring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/06—Tubes

Definitions

  • the invention relates to a method for welding a weld between two components of a filler wire of a level measuring device with the preamble features of claim 1 (see, eg DE 42 03 715 A ).
  • a welding additive is supplied in the form of a wire and introduced into the weld pool.
  • the first and the second component are welded together with the welding additive under heat supply.
  • the object of the invention is to improve a method for welding a weld between two components of a level measuring device with a view to the precision of the welding process and the resulting weld.
  • the starting point is a method for welding a weld seam between two components, in particular when producing a level gauge, wherein in the method a first component and a second component are placed against each other, a welding additive is supplied or supplied and the first component and the second component with the Welding additive are welded together under heat supply.
  • the shape of the welding additive is adapted to the region of the weld at the two components to be welded.
  • the welding additive in one component with a circular end which is to be welded to the other component is when the welding additive is formed annular and provided.
  • the welding additive is then provided in the region of the weld seam or the weld joint, in order to be aligned in an optimum position for the welding process. Lateral variations and movements as in the feeding of a wire as a welding additive are avoided.
  • the welding additive can also be provided in other forms when the components to be welded together have no circular end.
  • FIG. 1 it can be seen that several components 1, 2, 4 are to be welded together.
  • it is a process connection part 1 of a level measuring device with an opening 2.
  • an extension tube 3 is to be welded to the process connection part 1 as a counterpart.
  • another component 4 is shown, for example, another piece of pipe, which is to be welded to the opposite end of the extension tube 3.
  • a welding additive 5, 5 * is interposed in the region of the weld joint.
  • the welding additive 5, 5 * consists of a material which is particularly well suited for connecting the respectively adjacent components 1, 3 and 3, 4.
  • the weld seam is then assembled by welding the two adjacent components 1, 3; 3, 4 formed with the welding additive 6.
  • a welding device 5, 5 * is used for this purpose, which directs a laser beam onto the welding additive 5, 5 * or the resulting weld seam 8.
  • a shaped welding additive 5, 5 * is provided and used as the welding additive.
  • the welding additive according to the invention is provided annularly shaped. Preference is given to a flattened shape comparable to a sealing ring, which is set in the pipeline between two end pipe ends to seal them.
  • the shaped welding filler 5, 5 * consists of a filler material for forming a weld seam.
  • a welding device for supporting such a welding method preferably has holding devices 7 for clamping the components 1, 4 to be welded together.
  • the components 1, 3, 4 are clamped after insertion of the shaped welding additives 5, 5 * in the region of the welding joints in the holding device 7 such that the individual components and the welding additive elements 1, 3-4 are optimally positioned relative to one another.
  • the welding device 6 as a component of the welding device, the weld seam or in the present case the two weld seams 8 are formed by welding the components and the welding additive.
  • the welding device can be designed such that the welding device 6 is automatically rotated around the parts to be welded or the clamped components to be welded are rotated about a central axis of rotation.
  • the welding device is also designed to perform the entire welding process in a suitably suitable atmosphere, preferably atmosphere without atmospheric oxygen.
  • the extension pipe 3 and the further pipe section 4 are stainless steels preferably, in particular V4A steel of the material number 1.4435.
  • This merely exemplary material has a limited C content of not more than 0.03%, a chromium content of Cr 17-18%, a molybdenum content of Mo 2.5-3.0% and a nickel content of Ni 12.5-14.0%. on.
  • the ferrite content of the classic quality is 0%.
  • this material is preferred as welding additive 5, 5 * a material no. 1.4430 or 1.4576.
  • the material no. 1.4430 has a similar composition with the main components chromium 19%, nickel 12% and molybdenum 3% and is characterized by an increased delta ⁇ ferrite content
  • the insertion of the welding additive 5 between two components to be welded 1, 3 advantageously allows the production of a particularly high-quality weld 8. (embodiment, which is not subject of the invention).
  • the procedure is further improved in that the welding additive 5 is already preformed in such a way that it can be optimally interposed in the welding joint between the two components 1, 3 to be welded.
  • Such a shaped filler 5 * is then placed over the weld joint before the bite 8 is formed by means of the welder 6 by melting the adjacent components.

Description

Verfahren zum Schweißen einer Schweißnaht zwischen zwei Bauteilen eines Füllstandmessgeräts und derart hergestelltes Füllstandsmessgerät.Method for welding a weld between two components of a level measuring device and level measuring device produced in this way.

Die Erfindung bezieht sich auf ein Verfahren zum Schweißen einer Schweißnaht zwischen zwei Bauteilen eines Fülldraht eines Füllstandsmeßgeräts mit den oberbegrifflichen Merkmalen des Patentanspruchs 1 (siehe, z.B. DE 42 03 715 A ).The invention relates to a method for welding a weld between two components of a filler wire of a level measuring device with the preamble features of claim 1 (see, eg DE 42 03 715 A ).

Allgemein bekannt ist es, zwei Bauteile aneinanderzusetzen und unter Ausbildung einer Schweißnaht zusammenzuschweißen. Ggf. wird dabei ein Schweißzusatzstoff in Form eines Drahtes zugeführt und in das Schweißbad eingebracht. Das erste und das zweite Bauteil werden dabei mit dem Schweißzusatzstoff unter Hitzezuführung aneinandergeschweißt.It is generally known to place two components together and to weld together to form a weld. Possibly. In this case, a welding additive is supplied in the form of a wire and introduced into the weld pool. The first and the second component are welded together with the welding additive under heat supply.

Bei der Herstellung eines Füllstandsmessgeräts besteht die Problematik, an ein Prozessanschlussteil mit einer Öffnung ein Rohr anzuschweißen. Üblicherweise werden dabei Prozessanschlussteile und Rohre oder auch zwei Rohre untereinander zusammengeschweißt, welche aus einem hochwertigen Stahl, z.B. V4A-Stahl bestehen.In the manufacture of a level gauge, there is the problem of welding a pipe to a process connection part with an opening. Usually, process connection parts and pipes or even two pipes are welded together, which are made of a high-grade steel, e.g. V4A steel exist.

Besonders problematisch ist das Schweißen von Rundnähten unter Verwendung eines Schweißzusatzwerkstoffs an rotationssymmetrischen Körpern, wie derartigen Rohren. Insbesondere bei Laserschweißungen ist es erforderlich, einen solchen Schweißzusatzwerkstoff mit hoher Präzision an einen Schweißstoß zwischen zwei miteinander zu verschweißenden Bauteilen zuzuführen.Particularly problematic is the welding of round seams using a filler metal to rotationally symmetrical bodies, such as such pipes. In particular, in laser welding, it is necessary to supply such a welding filler with high precision to a weld joint between two components to be welded together.

Da dies sehr schwierig ist, werden Laserschweißungen als Rundnaht in der Regel ohne Zusatzwerkstoff ausgeführt. Ist es jedoch erforderlich, z.B. auf Grund der zu verschweißenden Werkstoffpaarung einen Schweißzusatzwerkstoff zu verwenden, so muss dieser in Drahtform hochpräzise in das Schweißbad zugeführt werden. Die genaue Positionierung ist dabei erforderlich, weil der Laserstrahl einen sehr kleinen Wirkpunkt besitzt. Ändert sich die Positionierung des Drahtes in nur einem kleinen Bereich, so ist die Qualität der Schweißnaht oftmals nicht mehr ausreichend oder der Prozess wird durch einen Anlagenstillstand gestört.As this is very difficult, laser welds are usually performed as a round seam without filler material. However, if it is necessary, for example, to use a welding filler material due to the material combination to be welded, so this must be supplied in high-precision wire in the weld pool. The exact positioning is required because the laser beam has a very small point of action. If the positioning of the wire changes in only a small area, the quality of the weld is often no longer sufficient or the process is disturbed by a plant downtime.

Aus US 4,134,607 ist ein ähnliches Schweißverfahren bekannt. Die DE 4203715 A1 beschreibt Schweißnähte bei Füllstandsmessgeräten.Out US 4,134,607 a similar welding process is known. The DE 4203715 A1 describes welds on level gauges.

Die Aufgabe der Erfindung besteht darin, ein Verfahren zum Schweißen einer Schweißnaht zwischen zwei Bauteilen eines Füllstandsmeßgerätes mit Blick auf die Präzision des Schweißvorgangs und der entstehenden Schweißnaht zu verbessern.The object of the invention is to improve a method for welding a weld between two components of a level measuring device with a view to the precision of the welding process and the resulting weld.

Diese Aufgabe wird durch ein Verfahren zum Schweißen einer Schweißnaht zwischen zwei Bauteilen mit den Merkmalen des Patentanspruchs 1.This object is achieved by a method for welding a weld seam between two components having the features of patent claim 1.

Ausgegangen wird von einem Verfahren zum Schweißen einer Schweißnaht zwischen zwei Bauteilen, insbesondere beim Herstellen eines Füllstandsmessgeräts, wobei bei dem Verfahren ein erstes Bauteil und ein zweites Bauteil aneinandergesetzt werden, ein Schweißzusatzstoff bereitgestellt bzw. zugeführt wird und das erste Bauteil und das zweite Bauteil mit dem Schweißzusatzstoff unter Hitzezuführung aneinander geschweißt werden.The starting point is a method for welding a weld seam between two components, in particular when producing a level gauge, wherein in the method a first component and a second component are placed against each other, a welding additive is supplied or supplied and the first component and the second component with the Welding additive are welded together under heat supply.

Gemäß der Erfindung ist somit, einen vorgeformten Schweißzusatzstoff bereitzustellen. Die Form des Schweißzusatzstoffes ist dabei dem Bereich der Schweißnaht bei den beiden zu verschweißenden Bauteilen angepasst.In accordance with the invention, therefore, is to provide a preformed welding additive. The shape of the welding additive is adapted to the region of the weld at the two components to be welded.

Vorteilhafte Ausgestaltungen sind Gegenstand abhängiger Ansprüche.Advantageous embodiments are the subject of dependent claims.

Gemäß der Erfindung, bei einem Bauteil mit einem kreisförmigen Abschluss, der an das andere Bauteil anzuschweißen ist, ist, wenn der Schweißzusatzstoff ringförmig ausgebildet und bereitgestellt wird. Der Schweißzusatzstoff wird dann im Bereich der Schweißnaht bzw. des Schweißstoßes bereitgestellt, um in einer für den Schweißvorgang optimalen Lage ausgerichtet zu werden. Seitliche Variationen und Bewegungen wie bei dem Zuführen eines Drahtes als Schweißzusatzstoff werden vermieden. Natürlich kann der Schweißzusatzstoff auch in anderen Formen bereitgestellt werden, wenn die miteinander zu verschweißenden Bauteile keinen kreisförmigen Abschluss aufweisen.According to the invention, in one component with a circular end which is to be welded to the other component is when the welding additive is formed annular and provided. The welding additive is then provided in the region of the weld seam or the weld joint, in order to be aligned in an optimum position for the welding process. Lateral variations and movements as in the feeding of a wire as a welding additive are avoided. Of course, the welding additive can also be provided in other forms when the components to be welded together have no circular end.

Ein Ausführungsbeispiel wird nachfolgend anhand der Zeichnung näher erläutert. Es zeigt:

Fig. 1
einen Querschnitt durch drei miteinander verschweißte Bauteile und Elemente einer Schweißvorrichtung.
An embodiment will be explained in more detail with reference to the drawing. It shows:
Fig. 1
a cross section through three welded together components and elements of a welding device.

Wie dies aus Fig. 1 ersichtlich ist, sollen mehrere Bauteile 1, 2, 4 miteinander verschweißt werden. Bei dem dargestellten Ausführungsbeispiel handelt es sich um ein Prozessanschlussteil 1 eines Füllstandmessgerätes mit einer Öffnung 2. Im Randbereich der Öffnung 2 soll an das Prozessanschlussteil 1 als Gegenstück ein Verlängerungsrohr 3 angeschweißt werden. Außerdem ist ein weiteres Bauteil 4 dargestellt, beispielsweise ein weiteres Rohrstück, welches an das gegenüberliegende Ende des Verlängerungsrohrs 3 angeschweißt werden soll.Like this Fig. 1 it can be seen that several components 1, 2, 4 are to be welded together. In the illustrated embodiment, it is a process connection part 1 of a level measuring device with an opening 2. In the edge region of the opening 2, an extension tube 3 is to be welded to the process connection part 1 as a counterpart. In addition, another component 4 is shown, for example, another piece of pipe, which is to be welded to the opposite end of the extension tube 3.

Zum Zusammenschweißen der drei Teile werden diese oder jeweils zwei der Bauteile passend aneinandergesetzt, wobei im Bereich des Schweißstoßes jeweils ein Schweißzusatzstoff 5, 5* zwischengesetzt wird. Der Schweißzusatzstoff 5, 5* besteht aus einem Werkstoff, welcher zum Verbinden der jeweils benachbarten Bauteile 1, 3 bzw. 3, 4 besonders gut geeignet ist. Derart zusammengesetzt wird anschließend die Schweißnaht durch Verschweißen der beiden benachbarten Bauteile 1, 3; 3, 4 mit dem Schweißzusatzstoff 6 ausgebildet. Vorzugsweise wird dazu eine Schweißeinrichtung 5, 5* verwendet, welche einen Laserstrahl auf den Schweißzusatzstoff 5, 5* bzw. die entstehende Schweißnaht 8 richtet.For welding together the three parts, these or in each case two of the components are fittingly placed against one another, wherein in each case a welding additive 5, 5 * is interposed in the region of the weld joint. The welding additive 5, 5 * consists of a material which is particularly well suited for connecting the respectively adjacent components 1, 3 and 3, 4. The weld seam is then assembled by welding the two adjacent components 1, 3; 3, 4 formed with the welding additive 6. Preferably, a welding device 5, 5 * is used for this purpose, which directs a laser beam onto the welding additive 5, 5 * or the resulting weld seam 8.

Um den Schweißzusatzstoff 5, 5* optimal zwischen die beiden miteinander zu verschweißenden Bauteile 1, 3; 3, 4 zu bringen wird als Schweißzusatzstoff ein geformter Schweißzusatzstoff 5, 5* bereitgestellt und verwendet. Im Fall miteinander zu verbindender rohrförmiger Bauteile 1, 3; 3, 4 wird der Schweißzusatzstoff gemäß der Erfindung ringförmig geformt bereitgestellt. Bevorzugt wird dabei eine abgeflachte Form vergleichbar einem Dichtungsring, welcher im Rohrleitungsbau zwischen zwei stirnseitige Rohrenden gesetzt wird, um diese abzudichten. Vorliegend besteht der geformte Schweißzusatzstoff 5, 5* jedoch aus einem Zusatzwerkstoff zum Ausbilden einer Schweißnaht.To the welding additive 5, 5 * optimally between the two components to be welded together 1, 3; 3, 4, a shaped welding additive 5, 5 * is provided and used as the welding additive. In the case of tubular components 1, 3 to be joined together; 3, 4, the welding additive according to the invention is provided annularly shaped. Preference is given to a flattened shape comparable to a sealing ring, which is set in the pipeline between two end pipe ends to seal them. In the present case, however, the shaped welding filler 5, 5 * consists of a filler material for forming a weld seam.

Eine Schweißvorrichtung zum Unterstützten eines solchen Schweißverfahrens weist vorzugsweise Halteeinrichtungen 7 zum Einspannen der miteinander zu verschweißenden Bauteile 1, 4 auf. Die Bauteile 1, 3, 4 werden nach dem Einsetzen der geformten Schweißzusatzstoffe 5, 5* in den Bereich der Schweißstöße in der Halteeinrichtung 7 derart eingespannt, dass die einzelnen Bauteile und die Schweißzusatzstoffelemente 1, 3 - 4 optimal zueinander positioniert sind. Nachfolgend werden mit der Schweißeinrichtung 6 als ein Bestandteil der Schweißvorrichtung die Schweißnaht bzw. vorliegend die beiden Schweißnähte 8 durch Verschweißen der Bauteile und des Schweißzusatzstoffes ausgebildet. Im Fall eingespannter rohrförmiger Bauelemente kann die Schweißvorrichtung dabei derart ausgebildet sein, dass die Schweißeinrichtung 6 automatisch um die zu verschweißenden Teile herum gedreht wird oder die eingespannten zu verschweißenden Bauteile um eine zentrale Rotationsachse rotiert werden. Je nach zu verschweißenden Werkstoffen ist die Schweißvorrichtung auch ausgebildet, den gesamten Schweißprozess in einer entsprechend geeigneten Atmosphäre, vorzugsweise Atmosphäre ohne Luftsauerstoff, durchzuführen.A welding device for supporting such a welding method preferably has holding devices 7 for clamping the components 1, 4 to be welded together. The components 1, 3, 4 are clamped after insertion of the shaped welding additives 5, 5 * in the region of the welding joints in the holding device 7 such that the individual components and the welding additive elements 1, 3-4 are optimally positioned relative to one another. Subsequently, with the welding device 6 as a component of the welding device, the weld seam or in the present case the two weld seams 8 are formed by welding the components and the welding additive. In the case of clamped tubular components, the welding device can be designed such that the welding device 6 is automatically rotated around the parts to be welded or the clamped components to be welded are rotated about a central axis of rotation. Depending on the materials to be welded, the welding device is also designed to perform the entire welding process in a suitably suitable atmosphere, preferably atmosphere without atmospheric oxygen.

Beim Herstellen eines Füllstandmessgerätes mit einem Prozessanschlussteil 1 als einem Bauteil und einem daran angesetzten Verlängerungsrohr 3 als einem weiteren Bauteil zum Anschluss eines anderweitigen Teils, insbesondere eines weiteren Rohrstücks 4, werden als Materialien für das Prozessanschlussteil 1, das Verlängerungsrohr 3 und das weitere Rohrstück 4 Edelstähle bevorzugt, insbesondere V4A-Stahl der Werkstoffnummer 1.4435. Dieser lediglich beispielhafte Werkstoff weist einen eingeschränkten C-Gehalt von maximal 0,03 %, einen Chromgehalt von Cr 17-18 % einen Molybdängehalt von Mo 2,5-3,0 % und einen Nickelgehalt von Ni 12,5-14,0 % auf. Der Ferritgehalt der klassischen Qualität liegt bei 0 %. Zum Verschweißen dieses Werkstoffes wird als Schweißzusatzstoff 5, 5* ein Werkstoff Nr. 1.4430 oder 1.4576 bevorzugt. Der Werkstoff Nr. 1.4430 weist eine ähnliche Zusammensetzung mit den Hauptbestandteilen Chrom 19 %, Nickel 12 % und Molybdän 3 % auf und kennzeichnet sich durch einen erhöhten Delta δ- FerritgehaltWhen manufacturing a level measuring device with a process connection part 1 as a component and an extension pipe 3 attached thereto as a further component for connecting another part, in particular a further pipe section 4, as materials for the process connection part 1, the extension pipe 3 and the further pipe section 4 are stainless steels preferably, in particular V4A steel of the material number 1.4435. This merely exemplary material has a limited C content of not more than 0.03%, a chromium content of Cr 17-18%, a molybdenum content of Mo 2.5-3.0% and a nickel content of Ni 12.5-14.0%. on. The ferrite content of the classic quality is 0%. For welding this material is preferred as welding additive 5, 5 * a material no. 1.4430 or 1.4576. The material no. 1.4430 has a similar composition with the main components chromium 19%, nickel 12% and molybdenum 3% and is characterized by an increased delta δ ferrite content

Das Einsetzen des Schweißzusatzstoffes 5 zwischen zwei zu verschweißende Bauteile 1, 3 ermöglicht vorteilhafterweise die Fertigung einer besonders hochqualitativen Schweißnaht 8. (Ausführungsbeispiel, das nicht unter dem Gegenstand der Erfindung steht). Weiter verbessert wird die Verfahrensweise dadurch, dass der Schweißzusatzstoff 5 bereits derart vorgeformt ist, dass er optimal in den Schweißstoß zwischen die beiden zu verschweißenden Bauteile 1, 3 zwischengesetzt werden kann. Neben dem Zwischensetzen des Schweißzusatzstoffes 5 zwischen die beiden zu verschweißenden Bauteile 1, 3 ist gemäß der Erfindung das Bereitstellen eines geformten Schweißzusatzstoffes 5* vorteilhaft, der im Fall zu verschweißender Rohrstücke ringförmig ausgebildet ist mit einem Innendurchmesser, welcher dem Außendurchmesser der zu verbindenden Rohrstücke entspricht. Ein solcher geformter Schweißzusatzstoff 5* wird dann über den Schweißstoß gelegt, bevor die Scheißnaht 8 mit Hilfe der Schweißeinrichtung 6 durch Aufschmelzen der benachbarten Komponenten ausgebildet wird.The insertion of the welding additive 5 between two components to be welded 1, 3 advantageously allows the production of a particularly high-quality weld 8. (embodiment, which is not subject of the invention). The procedure is further improved in that the welding additive 5 is already preformed in such a way that it can be optimally interposed in the welding joint between the two components 1, 3 to be welded. In addition to the intermediate setting of the welding additive 5 between the two components 1, 3 to be welded, it is advantageous according to the invention to provide a shaped welding additive 5 * which, in the case of pipe sections to be welded, is annular with an inner diameter which corresponds to the outer diameter of the pipe sections to be connected. Such a shaped filler 5 * is then placed over the weld joint before the bite 8 is formed by means of the welder 6 by melting the adjacent components.

Claims (2)

  1. A method for welding a weld seam (8) between two ring-shaped components (3, 4) of a filling level gauge, in which
    - a first component (3) and a second component (4) are placed against one another,
    cbaracterised in that
    - a welding filler material (5*) is prepared and
    - the first component (3) and the second component (4) are welded together using the welding filler material (5*) under the action of heat,
    - the welding filler material (5*) is pre-formed in a ring shape, has an internal diameter corresponding to the outer diameter of the two components (3, 4) lying against one another, so that the shape of the welding filler material (5*) is chosen to at least partially match the shape of the welding seam, wherein the welding filler material (5*) that is thus shaped is placed in the area of the weld seam (8) prior to welding, is then laid over the joint and is subsequently welded.
  2. A method according to claim 1, in which the first and/or the second component (3, 4) has a circularly shaped end, which is to be welded to the other component.
EP04010150A 2003-08-09 2004-04-29 Method of welding a seam between two workpieces of a level measuring device Expired - Fee Related EP1506834B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10336693 2003-08-09
DE10336693A DE10336693A1 (en) 2003-08-09 2003-08-09 Laser welding with additional material in ring form

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EP1506834A1 EP1506834A1 (en) 2005-02-16
EP1506834B1 true EP1506834B1 (en) 2008-08-20

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EP (1) EP1506834B1 (en)
CN (1) CN100391681C (en)
DE (2) DE10336693A1 (en)
HK (1) HK1077251A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004045961B4 (en) * 2004-09-22 2010-07-08 Airbus Deutschland Gmbh Arrangement and method for producing a clip skin connection for an aircraft by means of welding
DE102004054346A1 (en) * 2004-11-09 2006-05-11 Eads Deutschland Gmbh Method for welding joining partners by means of extruded molded part made of welding filler, as well as such a molded part for use in welding
DE102010035442B4 (en) 2010-08-23 2013-01-31 Keiper Gmbh & Co. Kg Method for connecting a fitting to a structural part of a vehicle seat
WO2014057311A1 (en) * 2012-10-11 2014-04-17 Gea Aircooled Systems Proprietary Limited A method and device for butt welding tubes
CN103464872A (en) * 2013-09-12 2013-12-25 昆山奥德鲁自动化技术有限公司 Welding method for nickel alloy and other metal
EP3045880A1 (en) * 2015-01-14 2016-07-20 VEGA Grieshaber KG Limit state measurement assembly
CN105397363A (en) * 2015-11-26 2016-03-16 重庆亨尔通冶金新技术股份有限公司 Butt welding clamp

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2646995A (en) * 1948-09-10 1953-07-28 Roland J Thompson Brazed joint with backing ring
CH283891A (en) * 1950-04-21 1952-06-30 Genevoise Degrossissage D Or Self-sealing device.
GB706015A (en) * 1950-06-29 1954-03-24 Babcock & Wilcox Ltd Improvements in or relating to joints between austenitic steel tubes or pipes and ferritic steel tubes or other elements
US2753428A (en) * 1953-06-05 1956-07-03 Graham Lattrell Method and apparatus for butt welding pipe sections
US2792490A (en) * 1954-12-10 1957-05-14 Gen Dynamics Corp Welding method and consumable weld insert therefor
US3033145A (en) * 1959-02-24 1962-05-08 Grinnell Corp Insert welding rings
US3246691A (en) * 1963-11-27 1966-04-19 Fedders Corp Radiators
US3358898A (en) * 1965-01-27 1967-12-19 Russell J Medkeff Repair tape
DD95812A3 (en) * 1971-04-22 1973-02-20
US3968982A (en) * 1973-09-19 1976-07-13 Siemens Aktiengesellschaft Coaxial metallurgical connection
GB1505832A (en) * 1974-12-02 1978-03-30 Welding Inst Friction welding methods and apparatus
US4134607A (en) * 1976-02-02 1979-01-16 Parker-Hannifin Corporation Member for welding to another member
FR2527491A1 (en) * 1982-05-26 1983-12-02 Creusot Loire WELDING PROCESS OF TWO PIECES
EP0204145A1 (en) * 1985-05-10 1986-12-10 Siemens Aktiengesellschaft Insert for coupling pipes by welding
WO1991015702A1 (en) * 1990-04-02 1991-10-17 Sundholm Goeran Welded pipe joint and apparatus for pressing together pipe ends on installing a pipe joint
DE69123673T2 (en) * 1990-09-17 1997-06-12 Hitachi Ltd Metal container with stem and branch pipe and its manufacturing process.
US5090612A (en) * 1991-02-13 1992-02-25 Globe-Union Inc. Method of fabricating a pressure vessel for a metal oxide-hydrogen battery
FR2678857B1 (en) * 1991-07-11 1993-09-24 Stein Industrie METHOD FOR BUTTON-TO-END WELDING OF TWO TUBE ENDS, AND DEVICE FOR IMPLEMENTING SAME.
DE4203715C2 (en) * 1992-02-08 1996-12-05 Grieshaber Vega Kg Device for determining and / or monitoring a predetermined fill level in a container
KR100281023B1 (en) * 1992-04-13 2001-02-01 가나이 쓰도무 Long tubular grounding vessel for gas insulated electrical equipment and laser welding equipment for manufacturing the same
NL1013477C2 (en) * 1999-11-03 2001-05-04 Vermaat Technics Bv Method and device for welding pipes.
JP2001355416A (en) * 2000-06-15 2001-12-26 Honda Motor Co Ltd Bonding method of valve seat for internal combustion engine

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CN1626303A (en) 2005-06-15
HK1077251A1 (en) 2006-02-10
DE10336693A1 (en) 2005-03-03
US20050029327A1 (en) 2005-02-10
EP1506834A1 (en) 2005-02-16
CN100391681C (en) 2008-06-04
DE502004007874D1 (en) 2008-10-02

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